Oxidizing furnace



July 17, 1934. z T PARKER 1,966,643

OXIDIZING FURNACE Filed June 27, 1933 s Sheets-Sheet 1 Invenior Z Tfa r%ez" J4 Home y y 17, 1934- Z. T. PARKER 1,966,643

OXIDIZ ING FURNACE Filed June 27, 1933 3 Sheets-Sheet 2 I lnvenfor Z fif'J a'i a) q By Wm flllomeu July 17, 1934. 7 z PARKER 1,966,643

OXIDIZING FURNACE Filed June 27, 1953 3 Sheets-Sheet 3 l atenteol July 17, 1934 UNITED STATES rat-TENT OFFICE- 2 Claims.

This invention relates to a furnace for the roasting, oxidation and volatilization of ores, minerals and metals, particularly molybdenum, the general object of the invention being to provide means for maintaining an equal temperature in the oxidizing chamber, means for controlling the temperature, and means for eliminating the combination of the materials roasted ordinarily caused by the combustion of the fuels.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views and which:-

Figure 1 is an end view of the furnace.

Figure 2 is a longitudinal sectional view therof.

Figure 3 is a transverse sectional view.

Figure 4 is a fragmentary perspective view of the oxidizing chamber.

Figure 5 is a detail sectional view showing portion of a tray and the means for supporting the same.

In these drawings, the numeral 1 indicates the outer shell of the furnace which has vertical sides and a substantially semi-circular top portion and while I prefer to use reinforced concrete, this part of the furnace, of course, can be made of any other suitable material. An interior lining 2 and 4 of fire brick or the like is placed against the inner faces of the walls of the furnace and a grate 3 is suitably supported in the lower part of the furnace and extends from one end thereof to the other.

A cylinder 5, having a flat bottom, passes through the space formed by the part 4 and is equally spaced from said part 4 with its ends passing through and supported as required in the center and by the end members 6 of the furnace. This member 5 forms an elongated chamber 7 for receiving the trays 8 in which the material to be treated is placed. These trays are supported by the frames 9 located in the chamber 7 and having the inwardly extending lugs 10 thereon on which the trays rest. A door 11 closes each end of the chamber '7 and contains the peep slots or openings 12 and the air holes 13. Another air hole 14 is placed in the upper part of each end of the cylinder 5.

A pair of doors 15 is placed at each end of the furnace for providing access to the fire box containing the grate 3 and other doors 16 are placed below the doors 15 for providing access to the space under the grate. Both sets of doors are 9 formed with the air holes 17.

A vertically arranged pipe 18 has its lower end in communication with the central part of the chamber 7 and branch pipes 19 lead from an outer part of this pipe 18 to intermediate portions of the chamber and the pipe 18 and the pipes 19 are each provided with a damper 20.

A centrally arranged smoke pipe 21 has its lower end in communication with the top part of the space formed by the cylinders 4 and 5 and ranch pipes 22 connect the smoke pipe 21 with l the substantially inverted U-shaped pipes 23 which have their lower ends in communication with said space adjacent the ends of the furnace. The pipe 21 and each limb of each pipe 23 is provided with a damper 24.

Thus it Will be seen that the products of combustion from the fuel burning on the grate 3 will pass around the cylinder 5,-thus heating the chamber '7 and the materials supported in the so trays therein and these products of combustion will pass through the pipes 21, 22 and 23, while the fumes from the materials in the chamber '7 will pass therefrom through the pipes 18 and 19. The cylindrical shape of the furnace and oxidizing chamber will produce a more equal temperature and the temperature in the various portions of the furnace and in various portions of the oxidizing chamber can be controlled by the dampers 24 in the various smoke pipes and the dampers 20 in the fume pipes.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What is claimed is:

1. A roasting, oxidizing and volatilizing furnace having an elongated fire box in its lower part and a combustion space in its upper portion of substantially circular shape in cross section, the lower part of said combustion space opening out into the firebox the full length of said space, a chamber forming member of substantially cylindrical shape passing through the space and uniformly spaced from the walls of ing its bottom opening out into the fire box and the bottom of the cylindrical member being fiat, said cylindrical member forming a chamber, means for supporting trays in said chamber, doors, for providing access to the chamber and to the fire box, located at the ends of the housing, smoke pipes connected with the upper portion of the combustion space adjacent the center and ends thereof, pipes connected with the upper part of the chamberadjacent the center and intermediate portions thereof and a damper in each pipe.

ZACHRIAH T. PARKER. 

